[Bug 55500] [sna gen4] corrupt rendering (and flickering on redraw)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=55500

--- Comment #101 from Zdenek Kabelac <zdenek.kabelac at gmail.com> ---
It could be probably worth to mention - that when I'm flipping between Firefox
tabs I could have scrolling tabs without any issue (and low GPU usage), while
flipping to other tabs and scrolling in them increases GPU to high levels and
visual problems are present.

So in the moment the problem appears - it's rather local to certain tabs.
And as I said - it's often enough to reload tab to temporarily fix the problem.

And as of typing current BZ message - I've noticed (using MAX 6) that letter
'a' in the word 'certain' above has been for a while drawn only from one half -
and after I've typed whole sentence it's been just refreshed properly.
(And I've not seen such behavior for quite a while... and I think I'm quite
sensitive for things like this)...

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